Naga are the former Kill the Eastern Rabbit; The change of name has been decided to fit the change of music: it has been simplified, brought back to more formulaic shapes. While it's certainly heavier, it also reminds a lot of Yob's powerful Stoner Doom.
With their first Ep, the trio did make a step in a less personal direction. It is however yet too soon to conclude from this that the band lost its soul in the process.